Exhaust aftertreatment system with silica filter
a silica filter and exhaust aftertreatment technology, applied in the field of exhaust aftertreatment systems, can solve the problems of increasing regeneration frequency, difficult siloxanes to disperse into the environment, and more acute problems
Active Publication Date: 2017-03-07
CATERPILLAR INC
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- Application Information
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Problems solved by technology
The problem may be more acute at the indoor waste transfer stations as it is more difficult for the siloxanes to dissipate into the environment.
The silica deposits may build up on exhaust aftertreatment components leading to restriction of the exhaust flow, which may increase backpressure to the engine, causing an increase in regeneration frequency.
Additionally, sensors can be coated or plugged, causing inaccurate readings or delayed response.
High concentrations of siloxanes in the ambient air may severely affect the maintenance intervals of the engine and / or work machine.
This may lead to more downtime and more parts to replace.
Method used
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[0019]The following detailed description includes the best currently contemplated mode and other exemplary embodiments. The description is not to be taken in a limiting sense, but is made merely for the purpose of illustrating general principles, since the scope is best defined by the appended claims.
[0020]Various features are described below that can each be used independently of one another or in combination with other features. However, any single feature may not address any of the problems discussed above, or may only address one of the problems discussed above. Further, one or more of the problems discussed above may not be fully addressed by any of the features described below.
[0021]Referring now to FIG. 1, an engine system 100 with an engine 102 and exhaust system 104 is illustrated. The engine 102 may be an internal combustion engine such as a diesel piston engine, a gasoline piston engine, a rotary engine, a turbine engine, or any other engine which may emit exhaust gases w...
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Abstract
An exhaust system including an upstream portion, a downstream portion, a service access, and a silica filter defines an exhaust gas flow path. The downstream portion includes an aftertreatment component. The service access is between the upstream portion and the downstream portion. The silica filter includes a silica filter element and a housing enclosing the silica filter element. The housing includes a filter gas inlet and a filter gas outlet, and defines a filter flow path through the silica filter element between the filter gas inlet and the filter gas outlet. The silica filter element is configured to filter silica from exhaust gases of the engine and structured to create a uniform distribution of silica throughout the silica filter element. The silica filter is configured to be removed and replaced through the service access. The exhaust gas flow path includes the filter flow path.
Description
PRIORITY[0001]This application claims priority to U.S. patent application Ser. No. 14 / 510138, entitled “Siloxane Filter in Exhaust Aftertreatment System”, and filed Oct. 9, 2014.TECHNICAL FIELD[0002]The present disclosure generally relates to exhaust aftertreatment systems. More particularly, the present disclosure relates to a silica filter in an exhaust aftertreatment systemBACKGROUND[0003]Indoor and outdoor waste transfer stations, and landfill operations are a major part of waste management. During operations at waste transfer stations, waste may be delivered via waste collection vehicles. The waste may include certain domestic products containing siloxanes which are non-toxic silicon-bearing organic compounds. After the waste is delivered and / or unloaded at waste transfer stations the waste may be moved, compacted, or in other ways managed with work machines, and then loaded onto other vehicles for further transport. When the waste is unloaded on a surface area of the landfill ...
Claims
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IPC IPC(8): B01D50/00F01N3/022B01D46/30B01D53/94F01N3/023F01N3/035F01N3/28
CPCF01N3/0224B01D46/30B01D53/944B01D53/9431F01N3/0237F01N3/035F01N3/2803F01N2250/02F01N2330/00F01N2330/30Y02T10/24B01D53/04B01D2257/553B01D2258/0283Y02T10/12
Inventor CLAYTON, JR., ROBERT D.DILTS, DEREK
Owner CATERPILLAR INC